A friend brought me a "very hard" sudoku,and ive learned most of the techniques, but i sense i need some other methodin order to solve this sudoku.i'd like you guys to direct me to the specific technique in which i have something to work with.regards, syxqn.

Your "friend" has pulled a dirty trick on you. When a solution needs Multi-Sector Locked Sets, then it needs a computer and not a manual solution.

Even when your grid is analyzed for 4-value Template combinations, the results don't reduce the puzzle to where basic techniques will finish solving it. Specifically, there are only 20 template combinations for the digits <1368> that don't result in a contradiction. These 20 combinations result in the following eliminations.

Hey guys, i rally appreciate the help with the data youre giving me, butIm working (imo) and worked with easier sudokus. I actually wanted you guys to address me to which specific techniqueThat i need to LEARN. In order to solve this sudoku. Im far from controlling Those techniques ure talking about. Im not presmptuous, i wanna learn, this is the reason i was glad to find this site of smart people like you. (-:In short i need guiding. Thx.

syxQn wrote:I actually wanted you guys to address me to which specific techniqueThat i need to LEARN. In order to solve this sudoku. Im far from controlling Those techniques ure talking about.

That puzzle isn't impossible, but from what you said it sounds like it is way beyond your ability level.

They did tell you which technique you need to learn: rank 0 logic. However that is one of the most complex techniques, one almost never mastered by human solvers and normally only used by computer programs.

You will also need to master nearly all of the solving techniques that are simpler than rank 0 logic in order to tackle that particular puzzle by hand.

Take a look at this page and start working on anything you don't already have mastered.

while this puzzle IS really, really, REALLY hard, it is emphatically NOT the world's hardest sudoku by quite a long way, since as you can see there's a multi-fish at the start that kills off a lot of candidates and reduces it to 9.0 se, and arto inkala is a well-known fraud/imposter.

in 2013 i wrote a thingy on another (non-sudoku) forum about arto inkala and the fakeness of the claim, as well as my (manual) solution path. i tried to make both explanations accessible to the layman. have a read through it if you want (i go by "zapmeister" on that forum, my posts start on page two)

syxQn wrote:I actually wanted you guys to address me to which specific techniqueThat i need to LEARN. In order to solve this sudoku. Im far from controlling Those techniques ure talking about.

That puzzle isn't impossible, but from what you said it sounds like it is way beyond your ability level.

They did tell you which technique you need to learn: rank 0 logic. However that is one of the most complex techniques, one almost never mastered by human solvers and normally only used by computer programs.

You will also need to master nearly all of the solving techniques that are simpler than rank 0 logic in order to tackle that particular puzzle by hand.

Take a look at this page and start working on anything you don't already have mastered.

youre the best, thats exactly what i was lurking for (-:ill better get starting with it..